<template>
    <div class="login-container">
        <div class="login-box">
            <h2 class="title">管理员登录</h2>
            <form @submit.prevent="handleSubmit">
                <div class="form-group">
                    <label for="username">用户名</label>
                    <input type="text" id="username" v-model="username" placeholder="请输入用户名" required
                        class="input-field" />
                </div>
                <div class="form-group">
                    <label for="password">密码</label>
                    <input type="password" id="password" v-model="password" placeholder="请输入密码" required
                        class="input-field" />
                </div>
                <button type="submit" class="submit-btn" :disabled="isLoading">
                    <span v-if="isLoading">正在登录...</span>
                    <span v-else>登录</span>
                </button>
            </form>
            <p v-if="errorMessage" class="error-message">{{ errorMessage }}</p>
        </div>
    </div>
</template>

<script>
import { ref } from 'vue';
import { useRouter } from 'vue-router';
import { login } from '@/api/login'; // 导入 login 函数
import axios from 'axios';

export default {
    setup() {
        const router = useRouter();
        const username = ref('');
        const password = ref('');
        const errorMessage = ref('');
        const isLoading = ref(false);

        const handleSubmit = async () => {
            if (username.value.trim() === '' || password.value.trim() === '') {
                errorMessage.value = '用户名和密码不能为空';
                return;
            }

            isLoading.value = true;
            errorMessage.value = '';

            try {
                const response = await login(username.value, password.value);

                if (response.data.code === 200) {
                    const token = response.data.data.token;

                    // 登录成功，保存 token
                    localStorage.setItem('token', token);
                    alert('登录成功！');

                    // 设置 JSESSIONID
                    setJSESSIONID();

                    // 跳转到后台页面
                    router.push('/adminpage');
                } else {
                    errorMessage.value = '登录失败，请检查用户名和密码';
                }
            } catch (error) {
                console.error(error);
                errorMessage.value = '请求失败，请稍后重试。';
                if (error.response) {
                    errorMessage.value = `服务器错误: ${error.response.status}`;
                } else if (error.request) {
                    errorMessage.value = '请求超时，请稍后再试';
                }
            } finally {
                isLoading.value = false;
            }
        };

        const setJSESSIONID = () => {
            const jsessionId = 'E078BDA1FB21E470932D560F82D85BCB';
            document.cookie = `JSESSIONID=${jsessionId}; path=/`; 

            // 将 JSESSIONID 存储在 localStorage 中
            localStorage.setItem('JSESSIONID', jsessionId);
            console.log('JSESSIONID 设置成功:', jsessionId);
            
        };

        return {
            username,
            password,
            errorMessage,
            isLoading,
            handleSubmit,
            setJSESSIONID
        };
    }
};
</script>

<style scoped>
/* 背景设置渐变效果 */
body {
    background: linear-gradient(135deg, #6a11cb, #2575fc);
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    margin: 0;
    color: #fff;
}

/* 登录框样式 */
.login-container {
    display: flex;
    justify-content: center;
    align-items: center;
    width: 100%;
    height: 100%;
}

.login-box {
    background-color: rgba(255, 255, 255, 0.9);
    border-radius: 15px;
    padding: 40px 50px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    max-width: 420px;
    width: 100%;
    text-align: center;
    transform: scale(1);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.login-box:hover {
    transform: scale(1.05);
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.2);
}

.title {
    font-size: 28px;
    font-weight: 700;
    color: #333;
    margin-bottom: 30px;
}

/* 表单组样式 */
.form-group {
    margin-bottom: 20px;
    text-align: left;
}

.form-group label {
    font-size: 14px;
    color: #555;
    margin-bottom: 8px;
    display: block;
}

.input-field {
    width: 100%;
    padding: 12px;
    font-size: 16px;
    border: 1px solid #ccc;
    border-radius: 8px;
    outline: none;
    transition: border 0.3s ease, box-shadow 0.3s ease;
}

.input-field:focus {
    border-color: #2575fc;
    box-shadow: 0 0 5px rgba(37, 117, 252, 0.5);
}

/* 按钮样式 */
.submit-btn {
    width: 100%;
    padding: 14px;
    background-color: #2575fc;
    color: white;
    border: none;
    border-radius: 8px;
    font-size: 16px;
    cursor: pointer;
    transition: background-color 0.3s ease, transform 0.3s ease;
}

.submit-btn:hover {
    background-color: #6a11cb;
    transform: translateY(-2px);
}

.submit-btn:disabled {
    background-color: #aaa;
    cursor: not-allowed;
}

/* 错误提示样式 */
.error-message {
    color: #ff4d4f;
    margin-top: 20px;
    font-size: 14px;
    font-weight: 600;
}

/* 响应式设计：适应小屏幕 */
@media (max-width: 480px) {
    .login-box {
        padding: 20px 30px;
    }

    .title {
        font-size: 24px;
    }

    .input-field {
        font-size: 14px;
        padding: 10px;
    }

    .submit-btn {
        font-size: 14px;
        padding: 12px;
    }
}
</style>
